What is it? Audi freshened the A3 four-door hatchback for 2009 and added in a 50-state legal, 2.0-liter diesel engine as an optional powerplant. This engine is supposed to return over 40 mpg on the highway, according to Audi. The 140-hp turbocharged engine produces 236 pound-feet of torque and drive...More •Jeep Grand Cherokee •Hyundai Equus •Hyundai Sonata •Porsche Panamera •BMW X1